| 81. | bury one's head in the sand |
| 不正视事实；逃避现实；不愿正视困难，采取舵鸟政策
|
| 82. | a sand mold for casting metals |
| 铸金属用的砂模
|
| 83. | mile upon mile of silver sand |
| 绵延数英里的白沙
|
| 84. | a layer of clay between two layers of sand |
| 夹在两层沙之间的一层泥土
|
| 85. | grains of sand [gold, salt ] |
| 沙［金、盐］粒
|
| 86. | the incalculable grains of sand on the seashore |
| 海边不计其数的沙粒
|
| 87. | grind glass with sand and water |
| 用沙和水研磨玻璃
|
| 88. | grains of sand beyond number |
| 数不清的沙粒
|
| 89. | pan off the sand and dirt |
| 用淘金盘淘去砂泥
|
| 90. | percolate water through sand |
| 用沙滤水
|